Duffel bag



FIG. 1 is a downward frontward rightward perspective view of a duffel bag according to our new design;

FIG. 2 is a downward rearward leftward perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right elevational view thereof; and,

FIG. 8 is a left elevational view thereof.

The uniformly-segmented broken lines shown on the straps, handles and the rectangular tag on the top flap in the drawings illustrate stitching and form a part of the claimed design.

The stippling shown in the drawings illustrates color contrast. 

I claim the ornamental design for a duffel bag, as shown and described. 